Convert env-log timestamps to local time

CHANGELOG.md

@@ -5,7 +5,7 @@
 # Change Log
 
 ## 0.9.20
-
+- The language server logs will now be in local time of whatever machine they are running on, rather than UTC.
 
 ## 0.9.19
 - Added configuration option to control the max cache size while resolving references in semantic analysis, defaulting to 500MB

Cargo.toml

@@ -44,6 +44,7 @@ clap = { version = "4.2", features = ["cargo", "derive"] }
 crossbeam = "0.8"
 crossbeam-deque = "0.8.1"
 crossbeam-utils = "0.8.7"
+chrono = { version = "0.4", default-features = false, features = ["clock"] }
 env_logger = "0.11"
 hashlink = "0.12"
 itertools = "0.14"

src/logging.rs

@@ -1,8 +1,11 @@
 //  © 2024 Intel Corporation
 //  SPDX-License-Identifier: Apache-2.0 and MIT
 
+use std::io::Write;
 use std::sync::LazyLock;
 
+use chrono::Local;
+
 macro_rules! info {
     ($($arg:tt)*) => {
         crate::log_with_fn!(log::info, log::Level::Info, $($arg)*)
@@ -73,10 +76,36 @@ pub fn init() {
     let max_level = dummy_logger.filter();
     env_logger::Builder::from_default_env()
         .filter_level(log::LevelFilter::Trace)
+        .format(local_time_format)
         .init();
     set_global_log_level(max_level);
 }
 
+/// Replicates `env_logger`'s default record format, except the timestamp is
+/// rendered in the system's local time zone
+fn local_time_format(
+    buf: &mut env_logger::fmt::Formatter,
+    record: &log::Record<'_>,
+) -> std::io::Result<()> {
+    // ISO 8601 with seconds precision (env_logger's default), but local time
+    // with the local UTC offset instead of the "Z" suffix.
+    let ts = Local::now().format("%Y-%m-%dT%H:%M:%S%:z");
+    let level = record.level();
+    let style = buf.default_level_style(level);
+    // Formatting 'style' normally enables it, doing it with :# disables it
+    write!(buf, "[{ts} {style}{level:<5}{style:#}")?;
+    let target = record.target();
+    if !target.is_empty() {
+        write!(buf, " {target}")?;
+    }
+    let msg = record.args().to_string();
+    if msg.contains('\n') {
+        writeln!(buf, "] {}", msg.replace('\n', "\n    "))
+    } else {
+        writeln!(buf, "] {msg}")
+    }
+}
+
 pub fn set_global_log_level(level: log::LevelFilter) {
     log::set_max_level(level);
 }